Great idea, but since Mr.Sweepy/Softie might say no, here are some of my ideas. My post mysteriously disappeared again. Anyway, what I was trying to say is that you should do one-times from the last chance sweeps list where they are sorted out from the rest of the sweeps. They are also sorted by date--the final three days to enter. Since you can only enter one time anyway, you would not have to look through them more than once. You would know that you entered all the possible contests that are ending on October 10th, for example, so you would know where you left off even if you were away from your computer for a day.
Another thing you can do to maximize time and prizes is to go to the featured sweepstakes list(this is just one of many ways to get there) and scroll down to the bottom to find the instant wins. Click on instant wins. Especially if you don't use My Lucky List, you can pull up all the instant wins, sort them by rating(my favorite way) and just play as many as you have time for.
As for the dailies--put them in My Lucky List when they are first posted. If you don't do it then you might as well only enter once or when you have a bit of extra time. Your chances are extremely limited if you don't have time to enter them every day or nearly every day.
But if Mr. Sweepy can do the check mark--yahoo. One would think if tabs turns red or green to show whether we entered or added to our lucky list, maybe we could hit a tab that turns it black to show it is taboo to us!